web3swift is an iOS toolbelt for interaction with the Ethereum network.
Join our discord or Telegram if you need support or want to contribute to web3swift development!
- Core features
- Installation
- Example usage
- Build from source
- Requirements
- Documentation
- Projects that are using web3swift
- Support
- Contribute
- Credits
- Security Disclosure
- License
- ⚡ Swift implementation of web3.js functionality
- 💭 Interaction with remote node via JSON RPC
- 🔐 Local keystore management (
gethcompatible) - 🤖 Smart-contract ABI parsing
- 🔓ABI decoding (V2 is supported with return of structures from public functions. Part of 0.4.22 Solidity compiler)
- 🕸Ethereum Name Service (ENS) support - a secure & decentralised way to address resources both on and off the blockchain using simple, human-readable names
- 🔄 Smart contracts interactions (read/write)
- ⛩ Infura support
- ⚒ Parsing TxPool content into native values (ethereum addresses and transactions) - easy to get pending transactions
- 🖇 Event loops functionality
- 🕵️♂️ Possibility to add or remove "middleware" that intercepts, modifies and even cancel transaction workflow on stages "before assembly", "after assembly" and "before submission"
- ✅Literally following the standards (BIP, EIP, etc):
- EIP-20 (Standard interface for tokens - ERC-20), EIP-67 (Standard URI scheme), EIP-155 (Replay attacks protection), EIP-2718 (Typed Transaction Envelope), EIP-1559 (Gas Fee market change)
- And many others (For details about this EIP's look at Documentation page): EIP-165, EIP-681, EIP-721, EIP-777, EIP-820, EIP-888, EIP-1155, EIP-1376, EIP-1400, EIP-1410, EIP-1594, EIP-1633, EIP-1643, EIP-1644, EIP-4361 (SIWE), ST-20
- RLP encoding
- Base58 encoding scheme
- Formatting to and from Ethereum Units
- Comprehensive Unit and Integration Test Coverage
The Swift Package Manager is a tool for automating the distribution of Swift code that is well integrated with Swift build system.
Once you have your Swift package set up, adding web3swift as a dependency is as easy as adding it to the dependencies value of your Package.swift.
dependencies: [
.package(url: "https://github.com/web3swift-team/web3swift.git", .upToNextMajor(from: "3.0.0"))
]Or if your project is not a package follow these guidelines on how to add a Swift Package to your Xcode project.
In the imports section:
import web3swift
import Web3CoreCocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:
$ sudo gem install cocoapodsTo integrate web3swift into your Xcode project using CocoaPods, specify it in your Podfile:
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '13.0'
target '<Your Target Name>' do
use_frameworks!
pod 'web3swift'
endThen, run the following command:
$ pod installWARNING: CocoaPods is a powerful tool for managing dependencies in iOS development, but it also has some limitations that preventing us of providing first class support there. We highly recommend using SPM first as using CocoaPods will delay new updates and bug fixes being delivered to you.
let transaction: CodableTransaction = .emptyTransaction
transaction.from = from ?? transaction.sender // `sender` one is if you have private key of your wallet address, so public key e.g. your wallet address could be interpreted
transaction.value = value
transaction.gasLimitPolicy = .manual(78423)
transaction.gasPricePolicy = .manual(20000000000)
web3.eth.send(transaction)let contract = web3.contract(Web3.Utils.erc20ABI, at: receipt.contractAddress!)!
let readOp = contract.createReadOperation("name")!
readOp.transaction.from = EthereumAddress("0xe22b8979739D724343bd002F9f432F5990879901")
let response = try await readTX.callContractMethod()let abiString = "[]" // some ABI string
let bytecode = Data.fromHex("") // some ABI bite sequence
let contract = web3.contract(abiString, at: nil, abiVersion: 2)!
let parameters: [Any] = [...]
let deployOp = contract.prepareDeploy(bytecode: bytecode, constructor: contract.contract.constructor, parameters: parameters)!
deployOp.transaction.from = "" // your address
deployOp.transaction.gasLimitPolicy = .manual(3000000)
let result = try await deployTx.writeToChain(password: "web3swift")func feeHistory(blockCount: UInt, block: BlockNumber, percentiles:[Double]) async throws -> Web3.Oracle.FeeHistory {
let requestCall: APIRequest = .feeHistory(blockCount, block, percentiles)
let response: APIResponse<Web3.Oracle.FeeHistory> = try await APIRequest.sendRequest(with: web3.provider, for: requestCall) /// explicitly declaring `Result` type is **required**.
return response.result
}git clone https://github.com/web3swift-team/web3swift.git
cd web3swift
swift build- iOS 13.0 / macOS 10.15
- Xcode 12.5
- Swift 5.5
Documentation is under construction👷🏻👷🏼♀️. We’re trying our best to comment all public API as detailed as we can, but the end it still far to come. But in one of the nearest minor updates we’ll bring DocC support of already done amount of docs. And your PR in such are more than welcome.
Please take a look at Our customers wiki page.
Join our discord and Telegram if you need support or want to contribute to web3swift development!
- If you need help, please take a look at our FAQ or open an issue.
- If you'd like to see web3swift best practices, check Projects that using web3swift.
- If you found a bug, open an issue.
To do local development and run the local tests, we recommend to use ganache which is also used by CI when running github actions.
// To install
$ npm install ganache --global
// To run
$ ganache
This will create a local blockchain and also some test accounts that are used throughout our tests.
Make sure that ganache is running on its default port 8546. To change the port in test cases locate LocalTestCase.swift and modify the static url variable.
We are using pre-commit to run validations locally before a commit is created. Please, install pre-commit and run pre-commit install from project's root directory. After that before every commit git hook will run and execute codespell, swiftlint and other checks.
Want to improve? It's awesome: Then good news for you: We are ready to pay for your contribution via @gitcoin bot!
- If you have a feature request, open an issue.
- If you want to contribute, submit a pull request.
- You are more than welcome to participate and get bounty by contributing! Your contribution will be paid via @gitcoin Grant program.
- Find or create an issue
- You can find open bounties in Gitcoin Bounties list
- Commita fix or a new feature in branch, push your changes
- Submit a pull request to develop branch
- Please, provide detailed description to it to help us proceed it faster.
@skywinder are charged with open-sourсe and do not require money for using web3swift library. We want to continue to do everything we can to move the needle forward.
- Support us via @gitcoin Grant program
- Ether wallet address:
0x6A3738c6299f45c31697aceA647D49EdCC9C28A4
- Alex Vlasov, @shamatar - for the initial implementation
- Petr Korolev, @skywinder - bootstrap and continuous support
- Anton Grigorev, @baldyash - core contributor, who use it and making a lot of improvements
- Yaroslav Yashin @yaroslavyaroslav - core contributor of 3.0.0 and later releases.
- Thanks to web3swift's growing list of contributors.
If you believe you have identified a security vulnerability with web3swift, you should report it as soon as possible via email to web3swift@oxor.io. Please do not post it to a public issue tracker.
web3swift is available under the Apache License 2.0 license. See the LICENSE for details.